Emerald S. Tay, M.D
NPI 1255331294ActiveIndividual· Internal Medicine· San Gabriel, CA
Internal Medicine (M.D) in San Gabriel, California, licensed in CA, with an NPI issued in July 2005. Their prescriptions cost Medicare Part D more than their services did: $957,899 for 9,848 claims, against $328,656 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 7 companies reporting payments in 2025, $224.17 in all, mostly food and beverage.
Overview
| NPI | 1255331294 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jul 29, 2005 |
| Last updated in NPPES | Dec 21, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A72223 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 424 |
|---|---|
| Services billed | 3,690 across 23 procedure codes |
| Paid by Medicare | $328,656 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,848 · 14,977 30-day fills |
|---|---|
| Patients | 385 |
| Total drug cost | $957,899 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Internal Medicine |
Other facilities
- All Care Home Health of San GabrielHome health agency · Rosemead, CA
- Heritage ManorNursing home · Monterey Park, CA
Industry payments (Open Payments)
- 2025$224.17 · 11 payments from 7 companies
- 2024$380.52 · 13 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $77.36 | 4 |
| Abbvie Inc. | $41.18 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $28.06 | 1 |
| Amgen Inc. | $25.09 | 1 |
| Novartis Pharmaceuticals Corporation | $19.79 | 1 |
What the 2025 payments were for
- Food and Beverage$224.17 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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